Hooray! Sony has finally released a special VAIO Update for Windows 10 Upgrade tool for VAIO PCs with Windows 8.1 pre-installed. Unfortunately, this does not work for VAIO PCs with Windows 8 pre-installed. Their users will have to wait until November 2015. Users of VAIO PCs with Windows 7, on the other hand, will basically have to "try their luck" as Sony will not be providing Windows 10 drivers for those VAIO PCs. However, it is not all smooth sailing for users of VAIO PCs with Windows 8.1 pre-installed. They could still face certain issues after upgrading to Windows 10. Here is the current list of limitations and issues with certain Sony VAIO models. Link : ED#217 : Windows 10 Upgrade Instructions For Sony VAIO PCs Thanks for the heads-up, noel_pg3!